What plant hardiness zone is Redwood Valley

Redwood Valley is located at Mendocino County, California (CA), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Redwood Valley is 9a by the USDA scale.

Coldest zone's winter temperature is +20 … +25 °F.

Plants of 9a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 9a USDA.

Redwood Valley, California @ wikipedia.